Cloud storage as one of the most important services of cloud computing helps cloud users break the bottleneck of restricted resources and expand their storage without upgrading their devices. In order to guarantee the security and privacy of cloud users, data are always outsourced in an encrypted form. Data deduplication is a technique for eliminating duplicate copies of data, and has been widely used in cloud storage to reduce storage space and upload bandwidth. However, encrypted data could incur much waste of cloud storage and complicate data sharing among authorized users. In heterogeneous data storage management scheme, which flexibly offers both deduplication management and access control at the same time across multiple Cloud Service Providers. The original data copy is first encrypted with a convergent key derived by the data copy itself, and the convergent key is then encrypted by a master key that will be kept locally and securely by each user. The encrypted convergent keys are then stored, along with the corresponding encrypted data copies, in cloud storage. If the original user of the group intimates the server with a user’s revocation, then the server rejects the proof of ownership submitted by that user. Likewise, session based deduplication is considered.